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<h1><span class="kind-method">sendMessage</span> method 
</h1></div>

    <section class="multi-line-signature">
      

<span class="returntype"><a href="https://api.flutter.dev/flutter/dart-async/Future-class.html">Future</a><span class="signature">&lt;<wbr><span class="type-parameter"><a href="../../models_v2_tim_value_callback/V2TimValueCallback-class.html">V2TimValueCallback</a><span class="signature">&lt;<wbr><span class="type-parameter"><a href="../../models_v2_tim_message/V2TimMessage-class.html">V2TimMessage</a></span>&gt;</span></span>&gt;</span></span>
<span class="name ">sendMessage</span>(<wbr><ol class="parameter-list"><li><span class="parameter" id="sendMessage-param-id">{<span>required</span> <span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/String-class.html">String</a></span> <span class="parameter-name">id</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-receiver"><span>required</span> <span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/String-class.html">String</a>?</span> <span class="parameter-name">receiver</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-groupID"><span>required</span> <span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/String-class.html">String</a>?</span> <span class="parameter-name">groupID</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-priority"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/int-class.html">int</a></span> <span class="parameter-name">priority</span> = <span class="default-value">0</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-onlineUserOnly"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/bool-class.html">bool</a></span> <span class="parameter-name">onlineUserOnly</span> = <span class="default-value">false</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-isExcludedFromUnreadCount"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/bool-class.html">bool</a></span> <span class="parameter-name">isExcludedFromUnreadCount</span> = <span class="default-value">false</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-isExcludedFromLastMessage"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/bool-class.html">bool</a></span> <span class="parameter-name">isExcludedFromLastMessage</span> = <span class="default-value">false</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-isSupportMessageExtension"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/bool-class.html">bool</a>?</span> <span class="parameter-name">isSupportMessageExtension</span> = <span class="default-value">false</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-isExcludedFromContentModeration"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/bool-class.html">bool</a>?</span> <span class="parameter-name">isExcludedFromContentModeration</span> = <span class="default-value">false</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-needReadReceipt"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/bool-class.html">bool</a></span> <span class="parameter-name">needReadReceipt</span> = <span class="default-value">false</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-offlinePushInfo"><span class="type-annotation"><a href="../../enum_offlinePushInfo/OfflinePushInfo-class.html">OfflinePushInfo</a>?</span> <span class="parameter-name">offlinePushInfo</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-cloudCustomData"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/String-class.html">String</a>?</span> <span class="parameter-name">cloudCustomData</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-localCustomData"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/String-class.html">String</a>?</span> <span class="parameter-name">localCustomData</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-isDisableCloudMessagePreHook"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/bool-class.html">bool</a>?</span> <span class="parameter-name">isDisableCloudMessagePreHook</span> = <span class="default-value">false</span>, </span></li>
<li><span class="parameter" id="sendMessage-param-isDisableCloudMessagePostHook"><span class="type-annotation"><a href="https://api.flutter.dev/flutter/dart-core/bool-class.html">bool</a>?</span> <span class="parameter-name">isDisableCloudMessagePostHook</span> = <span class="default-value">false</span>}</span></li>
</ol>)

      

    </section>
    


    
<section class="summary source-code" id="source">
  <h2><span>Implementation</span></h2>
  <pre class="language-dart"><code class="language-dart">Future&lt;V2TimValueCallback&lt;V2TimMessage&gt;&gt; sendMessage({
  required String id,
  required String? receiver,
  required String? groupID,
  int priority = 0,
  bool onlineUserOnly = false,
  bool isExcludedFromUnreadCount = false,
  bool isExcludedFromLastMessage = false,
  bool? isSupportMessageExtension = false,
  bool? isExcludedFromContentModeration = false,
  bool needReadReceipt = false,
  OfflinePushInfo? offlinePushInfo,
  String? cloudCustomData,
  String? localCustomData,
  bool? isDisableCloudMessagePreHook = false,
  bool? isDisableCloudMessagePostHook = false,
}) async {
  if (!TIMManager.instance.isInitSDK()) {
    return V2TimValueCallback&lt;V2TimMessage&gt;(code: TIMErrCode.ERR_SDK_NOT_INITIALIZED.value, desc: &quot;sdk not init&quot;);
  }

  V2TimMessage? v2timMessage = messageIDMap[id];
  if (v2timMessage == null) {
    print(&#39;sendMessage, messageIDMap cannot find message&#39;);
    return V2TimValueCallback&lt;V2TimMessage&gt;.fromBool(false, &#39;messageIDMap cannot find message&#39;);
  }

  if ((receiver == null || receiver.isEmpty) &amp;&amp; (groupID == null || groupID.isEmpty) ) {
    print(&#39;sendMessage, receiver and groupID cannot be empty at the same time&#39;);
    return V2TimValueCallback&lt;V2TimMessage&gt;.fromBool(false, &#39;sendMessage, receiver and groupID cannot be empty at the same time&#39;);
  }

  v2timMessage.priority = priority;
  v2timMessage.isOnlineOnly = onlineUserOnly;
  v2timMessage.isExcludedFromUnreadCount = isExcludedFromUnreadCount;
  v2timMessage.isExcludedFromLastMessage = isExcludedFromLastMessage;
  v2timMessage.isSupportMessageExtension = isSupportMessageExtension;
  v2timMessage.needReadReceipt = needReadReceipt;
  v2timMessage.isDisableCloudMessagePreHook = isDisableCloudMessagePreHook;
  v2timMessage.isDisableCloudMessagePostHook = isDisableCloudMessagePostHook;
  if (cloudCustomData != null) {
    v2timMessage.cloudCustomData = cloudCustomData;
  }

  if (localCustomData != null) {
    v2timMessage.localCustomData = localCustomData;
  }

  if (offlinePushInfo != null) {
    v2timMessage.offlinePushInfo = offlinePushInfo;
  }

  String convID = &quot;&quot;;
  TIMConvType timConvType = TIMConvType.kTIMConv_Group;
  if (groupID != null &amp;&amp; groupID.isNotEmpty) {
    convID = groupID;
    timConvType = TIMConvType.kTIMConv_Group;
  } else {
    convID = receiver!;
    timConvType = TIMConvType.kTIMConv_C2C;
  }

  String userData = Tools.generateUserData(&#39;sendMessage&#39;);
  Completer&lt;V2TimValueCallback&lt;V2TimMessage&gt;&gt; completer = Completer();
  void handleApiCallback(Map jsonResult) {
    V2TimValueCallback&lt;V2TimMessage&gt; callbackResult = V2TimValueCallback&lt;V2TimMessage&gt;.fromJson(jsonResult);
    if (callbackResult.data != null) {
      callbackResult.data!.id = id;
    }
    completer.complete(callbackResult);
  }

  NativeLibraryManager.timApiValueCallback2Future(userData, handleApiCallback);

  Pointer&lt;Char&gt; pConvID = Tools.string2PointerChar(convID);
  Pointer&lt;Char&gt; pMsgParam = Tools.string2PointerChar(json.encode(v2timMessage.toJson()));
  Pointer&lt;Void&gt; pUserData = Tools.string2PointerVoid(userData);
  Pointer&lt;Char&gt; pMessageID = NativeLibraryManager.bindings.DartSendMessage(pConvID, timConvType, pMsgParam, pUserData);
  String messageIDDart = Tools.pointerChar2String(pMessageID);

  &#47;&#47; 转发消息给多个人的时候，会重复使用一个 id
  &#47;&#47; messageIDMap.remove(id);

  return completer.future;
}</code></pre>
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